Pet brush



FIG. 1 is a right side perspective view of pet brush, showing my new design;

FIG. 2 is another right-side perspective view, shown in an open state of use;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof. 

CLAIM The ornamental design for pet brush, substantially as shown and described. 